I can't quite see it so well, but is the Black Mage giving the White Mage an apple? She seems to be slightly annoyed and dismissive about it. And he looks pissed about his advance being revoked.

Giving an apple to someone is sometimes considered as a means to convey sexual invitation. Or so says Duckman.

What is this?

I'm going to be sorely disappointed if it's just a gem or something.